Income Taxes- Schedule of Deferred Tax Assets for Federal Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets
Net operating losses	$ 72,689	$ 27,021
Capitalized research and development costs, net of amortization	33,778	11,907
Research and development credits	9,746	5,643
Start-up costs	4,407	4,744
Deferred revenue	13,353	0
Lease liability	668	1,451
Amortizable assets and other	21	59
Equity compensation	87	74
Gross deferred tax assets	134,749	50,899
Valuation allowance	(133,580)	(49,105)
Deferred tax assets, net of valuation allowance	1,169	1,794
Deferred tax liabilities
Right of use asset	(645)	(1,430)
Depreciation	(524)	(364)
Deferred tax liabilities	(1,169)	(1,794)
Net deferred tax assets and liabilities	$ 0	$ 0